how to make current obj solid and other obj as wireframe?
If the viewport is in wireframe shading, going into edit mode will show transparent faces on the edited object, while the others only show wireframe. To have the active object fully solid while the others are wireframe, you need to set the max draw of all other objects to wire. You can select all objects and use copy to selected to set them all the same.

You can press numpad-/ to go into local view, this shows only the selected object/s, you can then go into edit mode without the others being visible.